Before we start, scrunchie making isn't rocket surgery. If you can get somewhere
within the ballpark of almost halfway getting the right measurements, you're
perfect.

Cut a rectangle somewhere between 8 and 12 inches long and about 1.5 inches
wide-ish. Cut squiggly? Cut crooked? Doesn't matter. Keep in mind that the
more cloth you use, the puffier your scrunchie is.

Press the short ends inward.

Fold it like a hot dog and stitch it down.

Turn it inside out.

I'm fairly sure we got introduced to the bodkin in the
pants tutorial. Cut a piece of elastic half
as long as your cloth, stick a pin in one end, clip the bodkin on the other,
and run it through the scrunchie. (You can, naturally, sub in the bodkin
for a safety pin, but I'd really reccomend grabbing a bodkin.) Pin the ends
of the elastic to the ends of the scrunchie.

Sew both ends together. Stretch the scrunchie. If the elastic doesn't slip
out of the seam, you're done!